CFC replacements are a source of persistent organic pollution in the Arctic

Substances used to replace ozone-depleting chlorofluorocarbons (CFCs) may be just as problematic as their predecessors, a new study shows. In 1987, Canada implemented the Montreal Protocol, a global agreement to protect Earth's ozone layer by ceasing the use of substances like CFCs. Unfortunately, the CFC-replacement substances used to replace them are proving problematic as well, with accumulating levels of their degradation products recently found in the Canadian Arctic. Read more......